Web Watch

http://cryowwwebber.gsfc.nasa.gov

At the Cryogenics and Fluids Branch of NASA’s Goddard Space Flight Center, in Greenbelt, Maryland, Brent Warner and his colleagues develop astronomical sensors that work at cryogenic temperatures. The branch’s Web page is full of information for working cryogenicists, but it also offers tutorials on low-temperature technology for students and teachers.

http://www.nndc.bnl.gov/nudat2

Thanks to NuDat 2.0, you can do online searches of the databases held at Brookhaven National Laboratory’s National Nuclear Data Center. The software’s principal interface is an interactive chart of the nuclides. Clicking on a nuclide brings up information about its nuclear levels, half-life, spin-parity, and so on.

http://www.ieee-virtual-museum.org

The History Center of the Institute of Electrical and Electronics Engineers created the IEEE Virtual Museum to help advance its mission of promoting and preserving the history of information and electrical technologies. The museum holds several online exhibits, including The Beat Goes On: How Sounds Are Recorded and Played, and Powering the Electrical Revolution: Women and Technology.

To suggest topics or sites for Web Watch, please visit http://www.physicstoday.org/suggestwebwatch.html .